Thief experience 'bumps' for disarming traps and picking locks

In BG2 the amount of experience that a thief earns for disarming traps and picking locks goes up at certain levels.
Could someone tell me precisely at what levels these increases occur? I have the impression that one 'bump' is at level 10, but I'm not sure.
Thanks!
Could someone tell me precisely at what levels these increases occur? I have the impression that one 'bump' is at level 10, but I'm not sure.
Thanks!
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1750xp/400xp until lvl 11 thief(220000XP)
2750xp/950xp until lvl 16 thief(1320000XP)
3250xp/1550xp to max lvl.
if you play just thief is simple like i wrote abow but if you play multi you must get to that level in bouth classes for dual i don't now it strange for example imoen get 2750 xp on lvl 7/14 and 3250 at 7/24 i gess that it is (lvl1+lvl2)/2 if 10,5-15 then 2750 from 15,5 3250